ImageMagick -- PSD handler heap overflow vulnerability

An iDEFENSE Security Advisory reports:

Remote exploitation of a buffer overflow vulnerability in
The ImageMagick’s Project’s ImageMagick PSD image-decoding
module could allow an attacker to execute arbitrary
code.
Exploitation may allow attackers to run arbitrary code on
a victim’s computer if the victim opens a specially
formatted image. Such images could be delivered by e-mail
or HTML, in some cases, and would likely not raise
suspicion on the victim’s part. Exploitation is also
possible when a web-based application uses ImageMagick to
process user-uploaded image files.